+**F1d** denotes a class of indoor [model aircraft](/wiki/Model_Aircraft), masterpieces of minimal design. Powered by a delicate twisted [rubber motor](/wiki/Rubber_Motor), these ultra-light craft dance on air, seeking the longest possible flight. Competitors craft these feather-light machines for endurance, soaring silently within large indoor venues.
+## See also
+- [Free Flight](/wiki/Free_Flight)
+- [Aerodynamics](/wiki/Aerodynamics)
+- [Aircraft Design](/wiki/Aircraft_Design)
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